Infineon Details Gallium Nitride Converters for NVIDIA's 800-Volt AI Racks

Infineon Technologies AG on Oct. 21 highlighted gallium nitride intermediate bus converters in its broader work with NVIDIA on 800-volt AI data center systems, detailing a step in supplying power to dense computing racks.

The companies began collaborating in May 2025. Their work also covers power protection and other parts of the power chain. The latest update describes converters that lower voltage before subsequent circuits deliver power to processors.

An intermediate bus converter reduces the voltage supplied to accelerator cards. Infineon’s gallium nitride portfolio supports conversion from 800 volts to 50, 12 or six volts. The devices can switch at frequencies up to one megahertz, allowing smaller supporting components.

In reference designs released in March, an 800-to-50-volt converter exceeded 98% efficiency at full load, while an 800-to-12-volt design reached 97.1%. Those measurements cover individual conversion stages, rather than a complete rack or data center.

Higher-voltage distribution can carry a given amount of power with less current, reducing demands on conductors. Inside the rack, voltage must then be lowered before power reaches accelerator chips. The intermediate bus converter addresses that part of the power chain.

Google, Microsoft and NVIDIA are working through the Open Compute Project on common 800-volt requirements. One proposed approach places power racks beside computing equipment in existing facilities. Another converts electricity centrally and distributes 800-volt direct current across future facilities. The approaches allow 800-volt systems to coexist with existing alternating-current infrastructure.

“Gallium nitride-based system solutions are a key enabler of this next generation of data centers,” Infineon CEO Jochen Hanebeck said.

NVIDIA’s 800-volt power architecture targets racks drawing one megawatt or more starting in 2027.